Help pixie get blood testing.

About 3 days ago late at night after work we noticed pixie was having issues opening her left eye. It came out of nowhere. The next morning we took her to shively clinic and spent 300 dollars to get her testing and some medicine. We were told we would have to return for blood testing because they didnt know the cause of the issue and it is more than a simple pink eye type eye infection. We would like to take her to a nicer vet than shively as the vet didnt seem to be informed. Anything helps. Anyone who knows pixie knows she is the absolute sweetest cat youll ever meet and it is so sad to see her so stoic and sad. We just want our baby to get the best care possible a close vet friend told us we should take her to an optometrist and could cost up to 900 dollars.